CN219450180U

CN219450180U - Water level detection device of drum washing machine

Info

Publication number: CN219450180U
Application number: CN202320350135.5U
Authority: CN
Inventors: 赵红波
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-08-01
Anticipated expiration: 2033-02-28

Abstract

The utility model belongs to the technical field of washing machines, and particularly relates to a water level detection device of a drum washing machine, wherein the bottom of a washing inner drum is connected with an inner drum rotating shaft, a rolling bearing is arranged on an inner drum rotating shaft sleeve, the rolling bearing is connected with an iron bonding wire, the inner side of the bottom of the drum is coaxially provided with a circular detection contact, the detection contact is arranged on the bottom of the drum through an insulating base, the outer end of the inner drum rotating shaft is coaxially provided with a sliding contact, the detection contact is connected with the sliding contact through a rotating wire, the outer side of the sliding contact is slidingly connected with an elastic electric brush, a protection resistor is arranged on the rotating wire, a current sensor is arranged on a detection loop, and the bottom of the drum is electrically connected with the anode of a safety power supply through the inner drum rotating shaft and the rolling bearing; the detection contact is electrically connected with the negative electrode of the safety power supply through a rotary lead, a sliding contact and an elastic brush. The water level detection device is arranged on the inner washing cylinder, and solves the problem that the water level detection device of the existing washing machine can only be arranged on the outer cylinder and cannot adapt to the drum washing machine without the outer cylinder and the drum washing machine without the outer cylinder.

Description

Water level detection device of drum washing machine

Technical Field

The utility model belongs to the technical field of washing machines, and particularly relates to a water level detection device of a drum washing machine.

Background

At present, the full-automatic washing machine is mainly divided into two major categories of pulsator washing machine and drum washing machine, the washing drum of the traditional washing machine is a double-layer drum body consisting of an inner drum and an outer drum, the inner drum and the outer drum are communicated with each other, water is arranged in the inner drum and the outer drum during washing, and the water level detection device of the traditional washing machine is arranged on the outer drum. In order to solve the problem of dirt and scale between the inner barrel and the outer barrel of the washing machine, the washing machine without the outer barrel and the washing machine without the outer barrel have gradually increased in recent years, and the existing mode of installing the water level detection device on the outer barrel is not applicable any more because the outer barrel is free of water during washing. In addition, the washing cylinder of the pulsator washing machine is generally vertical, and the washing cylinders of the drum washing machine are all horizontal, so that the water containing modes of the washing cylinders of the two washing machines are greatly different, and compared with the water level detection difficulty of the drum washing machine is greater, the design of the water level detection device which can adapt to the drum washing machine without the outer drum or the drum washing machine without the outer drum becomes a great technical problem.

Disclosure of Invention

Aiming at the situation, the utility model designs a water level detection device of the drum washing machine, which well solves the technical problems of restricting the popularization and the application of the drum washing machine without the outer drum and the drum washing machine without the outer drum.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a drum type washing machine water level detection device, includes drum type washing machine's engine body shell and is used for splendid attire washing water's horizontal washing inner tube, the rotatable cover of washing inner tube is established in the engine body shell, be provided with safe power outside the engine body shell, the coaxial rigid coupling in the barrel bottom outside of washing inner tube has the inner tube pivot that is used for driving washing inner tube pivoted, and the inner tube pivot passes through antifriction bearing and engine body shell rotatable coupling, and antifriction bearing is connected with the bonding wire, and electric conduction between the barrel bottom of washing inner tube and the washing water, the barrel bottom of washing inner tube loops through inner tube pivot, antifriction bearing and bonding wire and a voltage output electricity of safe power is connected.

The inner side of the bottom of the washing inner barrel is coaxially and fixedly provided with at least one annular detection contact, the detection contact is fixedly arranged on the bottom of the washing inner barrel through an insulating base, the detection contact is insulated from the bottom of the washing inner barrel, the detection contact is electrically conductive with washing water, the outer side of a rotating shaft of the inner barrel is coaxially provided with a sliding contact, the detection contact is connected with the sliding contact through a rotary wire, the outer side of the sliding contact is slidably connected with an elastic electric brush, the elastic electric brush is connected with an electric brush wire, a protection resistor is arranged between the detection contact and the rotary wire, and an electric current detection device is arranged on the ground strap or the electric brush wire, and the detection contact is electrically connected with another voltage output end of a safety power supply through the protection resistor, the rotary wire, the sliding contact, the elastic electric brush and the electric brush wire in sequence.

Preferably, the insulating base is a circular ring-shaped insulator made of insulating materials, preferably a plastic circular ring, the insulating base is provided with a circular ring groove in a matching way, and the detection contact is embedded in the circular ring groove. The detection contact is made of conductor materials, and when the drum washing machine works, the lower part of the annular detection contact is soaked under the liquid level of the horizontal washing inner cylinder, so that the water level in the washing inner cylinder can be sensed and detected continuously.

Preferably, the inner cylinder rotating shaft is tubular, a threading hole is coaxially formed in the middle of the inner cylinder rotating shaft, a rotary wire penetrates out of the middle of the threading hole, a sliding contact is fixedly arranged at the axial center of the outer end of the inner cylinder rotating shaft, the rotary wire is electrically connected with the sliding contact, the inner cylinder rotating shaft is in transmission connection with a driving mechanism of the washing machine, and when the inner cylinder rotating shaft rotates, the rotary wire and the sliding contact synchronously rotate along with the inner cylinder rotating shaft.

Preferably, the outside of the rolling bearing is provided with a bearing seat in a matched manner, the bonding wire is connected to the bearing seat through bonding bolts, the rolling bearing and the bearing seat are made of metal materials, and the bonding wire can be electrically connected with the bottom of the washing inner cylinder through the rolling bearing.

Preferably, the safety power supply adopts an AC/DC power supply module for converting AC voltage into DC safety voltage, the input end of the AC/DC power supply module is connected with 220V AC voltage, the output voltage between the positive electrode and the negative electrode of the voltage output end is safety voltage below 42V, more preferably human safety voltage below 36V, still more preferably human safety voltage below 24V which can be in continuous contact, so as to prevent electric shock accidents.

Preferably, the elastic electric brush is a metal spring piece, and the elastic electric brush is in sliding contact with the sliding contact, so that uninterrupted reliable electric connection between the elastic electric brush and the sliding contact is ensured.

Preferably, the current detection device is a current sensor or an ammeter, and is used for measuring the current value on the water level detection circuit, when the current sensor is adopted, the current detection device needs to be connected to a control system of the full-automatic washing machine, and the corresponding current detection value can be displayed through a control panel of the washing machine; when the ammeter is adopted, the ammeter can be connected to the bonding wire or the brush wire in series, so that the current detection value can be read, and the ammeter can be mounted on a control panel of the washing machine.

Preferably, when the bottom of the washing inner cylinder is provided with a plurality of detection contacts, each detection contact is arranged in a concentric circle, each detection contact is electrically connected with the rotary wire through a protection resistor, and the resistance value of the protection resistor corresponding to each detection contact from the outer ring to the inner ring is sequentially decreased.

The utility model also includes other components that enable normal use thereof, all as is conventional in the art, and in addition, the utility model is not limited to devices or components such as: the machine body shell, the drainage structure, the driving mechanism, the control panel, the control system and the like of the washing machine all adopt the prior art in the field.

The beneficial effects of the utility model are as follows:

the water level detection device for the drum washing machine provided by the utility model has the advantages that the detection contact is arranged on the washing inner drum of the drum washing machine and can rotate along with the washing inner drum to continuously detect the water level in the washing inner drum, so that the technical problem that the conventional water level detection device cannot adapt to the drum washing machine without the outer drum or the drum washing machine without the outer drum is solved, and the development and the application of the drum washing machine without the outer drum and the drum washing machine without the water drum are facilitated.

Drawings

Fig. 1 is a schematic structural view of a water level detecting apparatus of a drum washing machine in an embodiment.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below in connection with specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments.

It should be noted that, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "middle", etc. are shown based on the drawings, and are merely for convenience of description.

Examples

As shown in figure 1, a water level detection device of a drum washing machine comprises a machine body shell 1 of the drum washing machine and a horizontal washing inner cylinder 2 for containing washing water, wherein the washing inner cylinder is rotatably sleeved in the machine body shell, a safety power supply 3 is arranged outside the machine body shell, the safety power supply adopts an AC220V/DC24V power supply module, an inner cylinder rotating shaft 5 for driving the washing inner cylinder to rotate is coaxially fixedly connected to the outer side of a cylinder bottom 4 of the washing inner cylinder, the inner cylinder rotating shaft is rotatably connected with the machine body shell through a rolling bearing 6, the rolling bearing is connected with an iron strap 7, a bearing seat 8 is cooperatively arranged on the outer side of the rolling bearing, the iron strap is connected to the bearing seat through an iron strap bolt 9, the iron strap is electrically connected with the cylinder bottom of the washing inner cylinder through the bearing seat and the rolling bearing, the cylinder bottom of the washing inner cylinder is electrically connected with the washing water, and the cylinder bottom of the washing inner cylinder is sequentially connected with a positive electrode of a voltage output end of the safety power supply through the inner cylinder rotating shaft, the rolling bearing and the iron strap.

As shown in fig. 2, two detection contacts 10 are coaxially and fixedly arranged at the inner side of the bottom of the washing inner barrel, the two detection contacts are annular metal coils sleeved in two concentric circles, the two detection contacts are fixedly arranged on the bottom of the washing inner barrel through two insulation bases 11, the insulation bases are plastic rings, insulation is provided between the detection contacts and the bottom of the washing inner barrel, circular grooves 12 are cooperatively arranged on the insulation bases, the detection contacts are embedded in the circular grooves, electric conduction is provided between the detection contacts and washing water, an inner barrel rotating shaft is in a circular pipe shape, a threading hole is coaxially arranged in the middle, a rotary wire 13 is coaxially arranged in the threading hole, a sliding contact 14 is fixedly arranged at the axial center of the outer end of the inner barrel rotating shaft, the rotary wire is electrically connected with the sliding contact, when the inner barrel rotating shaft rotates, the rotary wire and the sliding contact synchronously rotate along with the inner barrel rotating shaft, the detection contact is electrically connected with the sliding contact through a rotating wire, an elastic brush 15 is slidably connected to the outer side of the sliding contact, the elastic brush is a metal spring piece, sliding contact is carried out between the elastic brush and the sliding contact, uninterrupted reliable electrical connection between the elastic brush and the sliding contact is guaranteed, the elastic brush is connected with a brush wire 16, two protection resistors 17 are correspondingly arranged between the two detection contacts and the rotating wire, the resistance value of the protection resistor of the outer ring detection contact is 20KΩ, the resistance value of the protection resistor of the inner ring detection contact is 2KΩ, a current sensor 18 is arranged on the brush wire, the current sensor is connected to a control system of the full-automatic washing machine, the corresponding current value on a water level detection circuit is displayed through a control panel (not shown in the figure) of the washing machine, and the detection contact sequentially passes through the protection resistors, the rotary lead, the sliding contact, the elastic brush and the brush wire are electrically connected with the negative electrode of the voltage output end of the safety power supply.

According to the water level of the washing water in the inner washing barrel, each detection contact is sequentially reached, and a conductive loop is formed between the corresponding detection contact and the barrel bottom of the inner washing barrel through the washing water serving as a conductor, and the current in the corresponding detection circuit is different due to the fact that the protection resistors connected with the detection contacts are different in size, so that the water level of the washing water in the inner washing barrel can be correspondingly obtained. In addition, as the content of the laundry detergent or impurities in the laundry water increases, the current generated in the circuit increases, so that when rinsing is about to end, the control panel can judge the content of the impurities and the laundry detergent in the laundry water through the read current, and further judge whether the laundry is rinsed cleanly or not.

The technical solution of the present utility model is not limited to the above-described specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modifications made within the spirit and principles of the present utility model fall within the scope of the present utility model.

Claims

1. The utility model provides a drum type washing machine water level detection device, includes drum type washing machine's organism shell and is used for splendid attire washing water's horizontal washing inner tube, washing inner tube rotationally overlaps and establishes in the organism shell, its characterized in that: the outer side of the bottom of the washing inner cylinder is coaxially and fixedly connected with an inner cylinder rotating shaft for driving the washing inner cylinder to rotate, the inner cylinder rotating shaft is rotatably connected with the machine body shell through a rolling bearing, the rolling bearing is connected with an iron bonding wire, the bottom of the washing inner cylinder is electrically conductive with washing water, and the bottom of the washing inner cylinder is electrically connected with a voltage output end of the safety power supply through the inner cylinder rotating shaft, the rolling bearing and the iron bonding wire in sequence; the inner side of the drum bottom of the washing inner drum is coaxially and fixedly provided with at least one annular detection contact, the detection contact is fixedly arranged on the drum bottom of the washing inner drum through an insulating base, insulation is provided between the detection contact and the drum bottom of the washing inner drum, conduction is provided between the detection contact and washing water, the outer side of a rotating shaft of the inner drum is coaxially provided with a sliding contact, the detection contact is connected with the sliding contact through a rotating wire, the outer side of the sliding contact is slidably connected with an elastic electric brush, the elastic electric brush is connected with an electric brush wire, a protection resistor is arranged between the detection contact and the rotating wire, and a current detection device is arranged on the bonding wire or the electric brush wire.

2. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: the insulating base is annular, an annular groove is formed in the insulating base, and the detection contact is embedded in the annular groove.

3. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: the inner cylinder rotating shaft is coaxially provided with a threading hole in the middle, and the rotating wire is arranged in the threading hole in a penetrating mode.

4. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: the outside of the rolling bearing is provided with a bearing seat in a matching way, and the bonding wire is connected to the bearing seat through a bonding bolt.

5. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: the safety power supply adopts an AC/DC power supply module for converting alternating current voltage into direct current safety voltage.

6. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: when the bottom of the washing inner barrel is provided with a plurality of detection contacts, the detection contacts are arranged in concentric circles, the detection contacts are electrically connected with the rotary wire through the protection resistor, and the resistance value of the protection resistor corresponding to the detection contacts from the outer ring to the inner ring is gradually decreased.

7. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: the elastic electric brush is a metal spring piece, and is in sliding contact with the sliding contact.

8. The drum washing machine water level detection apparatus as claimed in claim 1, wherein: the current detection device is an ammeter or an ammeter.